package main

import (
	"fmt"
	"unsafe"
)

func main() {

	const (
		o1 = iota
		o2 = iota
	)

	const o3 = iota

	fmt.Println(o1, o2, o3)

	const (
		a = iota
		b = "abc"
		c = iota
	)

	fmt.Println(a, b, c)

	var e = 100 //int
	var f int32

	f = int32(e) //不能直接赋值，需要强转

	fmt.Println(f)

	fmt.Println(unsafe.Sizeof(1))
}
